Datasheet

HMP8156A
NTSC/PAL Video Encoder

Overview
Parametrics
Documents
Packaging and Environmental
Resources
Order

Typical Diagram

Key Features

(M) NTSC and (B, D, G, H, I, M, N, CN) PAL Operation
ITU-R BT.601 and Square Pixel Operation
Digital Input Formats

4:2:2 YCbCr
8-Bit or 16-Bit
4:4:4 RGB
16-Bit (5, 6, 5) or 24-Bit (8, 8, 8)
Linear or Gamma-Corrected
8-Bit BT.656

Overlay Mixing

7 Colors
Internal, External, or Hard Mixing Control

Analog Output Formats

Y/C + Two Composite
RGB + Composite (SCART)

Flexible Video Timing Control

Timing Master or Slave
Programmable Input Sync Timing
Selectable Polarity on Each Control Signal
Programmable Blank Output Timing
Field Output

Closed Caption Encoding for NTSC and PAL
2x Upscaling of SIF Video
Three Line Vertical Flicker Filter (HMP8154 only)
Four 2x Oversampling, 10-Bit DACs with Power Down
I²C Interface
Pb-Free Plus Anneal Available (RoHS Compliant)

Description

The HMP8156 NTSC and PAL encoder is designed for use in systems requiring the generation of high-quality NTSC and PAL video from digital image data.

YCbCr or RGB digital video data drive the P0-P23 inputs. Overlay inputs are processed and the data is 2x upsampled. The Y data is optionally lowpass filtered to 5MHz and drives the Y analog output. Cb and Cr are each lowpass filtered to 1.3MHz, quadrature modulated, and summed. The result drives the C analog output. The digital Y and C data are also added together and drive the two composite analog outputs.

The YCbCr data may also be converted to RGB data to drive the DACs, allowing support for the European SCART connector.

The DACs can drive doubly-terminated (37.5Ω) lines, and run at a 2x oversampling rate to simplify the analog output filter requirements.